195870390 has 32 divisors (see below), whose sum is σ = 477799776. Its totient is φ = 51375360.

The previous prime is 195870377. The next prime is 195870391. The reversal of 195870390 is 93078591.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195870391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51687 + ... + 55346.

It is an arithmetic number, because the mean of its divisors is an integer number (14931243).

Almost surely, 2^195870390 is an apocalyptic number.

195870390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195870390 is an abundant number, since it is smaller than the sum of its proper divisors (281929386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195870390 is a wasteful number, since it uses less digits than its factorization.

195870390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107104.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 195870390 is about 13995.3703059262. The cubic root of 195870390 is about 580.7505048644.

The spelling of 195870390 in words is "one hundred ninety-five million, eight hundred seventy thousand, three hundred ninety".